Trustix Secure Linux Security Advisory #2006-0040: SCTP conntrack (ip_conntrack_proto_sctp.c) in netfilter allows remote attackers to cause a denial of service (crash) via a packet without any chunks, which causes a variable to contain an invalid value that is later used to dereference a pointer.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/48096/TSLSA-2006-0040.txt
Source: https://packetstormsecurity.com/files/48096/Trustix-Secure-Linux-Security-Advisory-2006.40.html